To find the percentage change from 300 to 350, we need to first calculate the difference between the two numbers.

Step 1: Difference = Final Value - Initial Value

Difference = 350 - 300

Difference = 50

Step 2: Next, we need to find the absolute value of the difference. This is because percentage change is always calculated as a positive value.

Absolute Difference = |Difference|

Absolute Difference = |50|

Absolute Difference = 50

Step 3: Now, we can calculate the percentage change using the formula:

Percentage Change = (Absolute Difference / Initial Value) x 100

Percentage Change = (50 / 300) x 100

Percentage Change = 16.67%

Therefore, the percentage change from 300 to 350 is 16.67%. This means that there was an increase of 16.67% from 300 to 350.